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He added: “Above 300m North Wales will see in order of up to 10cm of snow and certainly higher for example Snowdon I would not be surprised if 40cm falls, however the wind will blow much of it away.

“At sea level it’s more likely to be rain and wintry showers that will mix with snow to bring hail and sleet.”

Steve Ramsdale, deputy chief meteorologist at the Met Office added: “Wales will see a spell of rain during Thursday, and there’s a chance this could turn to sleet or snow, especially over hills later in the day.

“Forecasting snow is always challenging and there’s often a fine line between whether it will rain or snow in a particular location depending on slight changes in air temperature.”

The Met Office says that daytime temperatures are likely to be between 2-5C, but strong winds will make it feel much colder.

Weather experts are also warning that the severe icy conditions will cause disruption on the roads.

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A Met Office spokesman said: “A cold northwesterly airstream will be in place throughout Thursday bringing occasional snow showers. Around 2cm of snow is possible even to low levels in places. 5-10 cm is possible on high ground above about 200 m.”

While according to www.snow-forecast.com temperatures could plummet to -3C on Snowdon on Thursday morning with light snow falling, before heavy rain washes it away on Saturday night.

They said: “A light covering of new snow, mostly falling on Saturday afternoon will be washed away by heavy rain (total 37.0mm) on Saturday night.